Watchmaker&#39;s tool.



J. D. KETHLEY.

WATCHMAKERS TOOL.

APPLICATION FILED MAR. 24. I917.

1 ,252,58% Patented Jan. 8, 1918.

2 SHEETS SHEET l.

INVENTOR WITNESSES W m ATToRN EY J. D. KETHLEY.

WA TCHMAKERS TOOL. APPLICATION FILED MAR. 24. 1911.

1,252,584. Patented Jan. 8, 1918. A

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\NVENTOR Wn'NEssZ Jemab BY @wfl W ATTo R N EY ATE FFIQEQ JACOB D. KETHLEY, OF MUNDAY, TEXAS.

WATCHMAKERS TOOL.

Specification of Letters Patent.

Patented Jan. 8, 19 8.3.

Application filed March 24, 1917. Serial No. 157,134.

To all whom it may concern:

lie it known that I, JACOB D. KETHLEY, a citizen of the United States, residing at hflunday, in the county of Knox and State of Texas, have invented new and useful Improvements in lVatchmakers Tools, of which the following is a specification.

This invention is an improved watchmakers tool especially adapted for use in setting the roller jewel in the balance-wheel of a watch without removing the hair spring or the roller table.

The object of the invention is to provide an improved tool of this character which is simple in construction, and which enables a roller jewel to be set in the balance-wheel of a watch with absolute accuracy, even by a poor workman, and without the necessity of removing the hair-spring or the roller table, and without danger of injury to the balance-wheel or the hairspring.

The invention consists in the construction, combination and arrangement of devices hereinafter described and claimed.

In the accompanying drawings:

Figure 1 is av plan of a watchmakers tool constructed in accordance with my invention and showing the same arranged for use in setting the roller jewel in a balancewheel.

F i 2 is an inverted plan of the same.

Fig. 3 is an elevation, showing the tool as arranged with the point of the stake in the jewel-hole of a balance-wheel rollertable.

Fig. t is a vertical sectional view of the same on a plane at right angles to Fig. 3.

Fig. 5 is a detail sectional view of the same on the plane indicated by the line (Z(t of Fig. 2.

Fig. 6 is an elevation of the same, showing the stake arranged in reverse position and as presenting the jewel to the jewelhole of the roller-table.

Fig. 7 is a sectional view of the same at right angles to Fig. 6, and showing the stake in the act of setting the jewel in the jewelhole of the roller-table, the heat-conductor copper strip being indicated in said Fig. 7, and also in Fig. 6.

Fig. 8 is a detail view of a portion of the device.

In the embodiment of my invention, I provide a base-plate 1, which is here shown as circular, and which has a recess 2 in one side. The base-plate is provided with a suitable number of supporting feet 3 which project from its lower side. In the center of the base-plate is an opening 4, which is circular, and is of sufiicient size to receive and clear the hair-spring, a of a balancewheel I). A pair of clamping-arms 5 are employed, which are arranged opposite each other, and which are adapted to bear on opposite sides of a balance-wheel. Each clamping-arm has a slot 6. Set screws 7 are provided for clamping the arms in place, said set screws passing through the slot 6 and having threaded engagement with the base plate.

The base-plate is provided with a radial slot 8 in the side opposite the recess 2, said slot being open at the outer end. A carriage 9 is mounted for radial movement on the base-plate, its base 10 being grooved in opposite sides, as at 11, to engage the sides of the slot 8, and to slidably connect the carriage to the base-plate, and said carriage has a pair of lugs 12 which depend therefrom and are suitably spaced apart. A block 13 is secured to the underside of the base by screws 14, and is arranged between the lugs of the carriage, and has a threaded opening which is engaged by an adjusting screw 15 the said screw being swivelly mounted in the lugs and being provided at its outer end with a milled head 15, whereby it may be readily turned to radially adjust the carriage.

The carriage has a curved arm 16 which is provided with a vertical opening at its outer end and with a tubular sleeve 17 extending upwardly, the said sleeve being provided with an annular groove 18. A stake 19 is provided which is reversibly fitted in the vertical opening in the carriage and is provided at one end with a point 20 to enter the jewel hole of the roller table 0. At the opposite end of the stake is a semi-cylindrical outwardly reduced arm 21 having a recess 22 on its inner side to receive a roller jewel indicated at (Z and a spring arm 23 to hold the roller jewel in place in said recess and coaxially with the point 20 of the stake. In one side of the stake is a longitudinal groove 24. A collar 25 is arranged to fit and turn on the sleeve of the carriage, has an opening through which the stake extends and has a stud 26 to engage the groove of the stake and hence cause the latter to turn with the collar. A set-screw 27 with which the collar is provided serves to engage the groove of the sleeve and thus swivelly' mount the collar on the sleeve and also adjustably secure the collar and the stake in the carriage.

In the operation of my invention, the balance-wheel with the roller-table on its upper side is placed on the center of the base-plate and with the jewel-hole of the roller-table engaged by the point 20 of the stake, the balance-wheel being held in this position by the clamping arms and the hair-spring be ing arranged in the opening in the baseplate and cleared thereby, neither the rollerplate nor the hair-spring being required to be removed. 7

When the balance-wheel has been thus arranged and with the ewel-hole in the rollertable engaged by the point 20 of the stake, as shown in Fig. t, the roller-jewel to be set is then placed in the other end of the stake, in the recess 22, and engaged and is held in place by the clamping-spring or jaw 23, the said jewel being arranged to project outwardly from the stake the desired length to go into the jewel-hole in the roller-table. The stake is then reversed, as shown in Fig. 6, and tried, to see if the jewel will fit accurately in the hole of the roller table. If necessary to eilect this, the carriage can be adjusted by the screw 15, as will be understood When the required adjustment has been made the stake is then raised and a suitable copper strip 28 is slipped over the roller-table, as shown in Figs. 67, a small quantity of cement is placed in the jewelhole and the tool is then held in the fingers and the copper strip heated over the flame of a lamp. conductor to convey heat to the cement; and when the same is melted, the stake is then pushed downwardly to place the jewel in position in the hole. Heat is then applied again to insure perfect adhesion of the jewel and cement. The copper strip is then allowed to cool and the stake raised, leaving the jewel in the correct position. My improved jewel-setting tool enables a jewel to be set correctly, regardless of the size of the opening in the roller-table. It enables a jewel to be set as easily in a large hole and as correctly as in a hole that fits the jewel. This is important, and an advantage over other tools of this character and the tool also enables the jewel to be set without the necessity of removing the roller-table or the hairspring.

The balance-wheel, being placed on the base plate, is protected from the heat, and

The copper strip serves as a there is no danger of the balance-wheel or the hair-spring being injured by the heat. Another advantage gained by the use of the tool is that it insures the absolutely correct setting of the jewel owing to the fact that the tool enables the balance wheel, together with the roller table to be securely held, and enables the stake to be accurately positioned and steadily held with reference to the hole in the roller table, and to be also guided and held in the required position for setting the jewel. Hence the tool enables a jewel to be correctly set even by a poor workman.

While I have herein shown and described a preferred form of my invention, I would have it understood that changes may be made in the form, proportion and construction of the several parts without departing from the spirit of the invention and withintlie scope of the appended claims.

Having thus described my invention, I

claim 1. In a jewel-setting toolof the class described, a base plate presenting a plane up per surface on which a balance wheel may directly bear, and also having an opening of sutlicient size to receive and permit the passage up and down therethrough of the hair spring and hence enable the balance wheel to be arranged on the base plate without the necessity of removing the hair spring and the roller table, means to hold a stake forengagement with the jewel-hole ofthe roller table, and means to secure the balance wheel on the base plate.

2. In a tool of the class described, a base plate, a carriage, a collar arranged to turn on the carriage and a stake extending through an opening in the carriage and engaged with the collar to turn with the latter, the stake being arranged for sliding movement in the carriage and collar.

3. In a tool of the class described, a base plate, a carriage, a collar arranged to turn on the carriage and a stake extending through an opening in the carriage and engaged with the collar to turn with the latter, the stake being arranged for sliding movement in the carriage and collar, and

means to secure the collar and hence also the stake in adjusted position.

In testimony whereof I affix my signature in presence of two witnesses.

JACOB D. KETHLEY. lVitnesses C. L. BRAY, C. A. EILAND.

Copies of this patent may beobtained. for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

